LEDE for RTL8196C

这是一个未完成的项目，但是应该不会再更新了。

此代码没有使用任何原始 Realtek SDK 的源码，全部根据其源码重写编写符合 Linux 和 LEDE 要求的 arch 和驱动程序。

arch 部分预留了移植其它 RTL819X 芯片支持的空间。
SPI 驱动使用标准 SPI 总线接口，配合 m25p80 以支持绝大多数的 SPI NOR 闪存。
以太网驱动参照 ag71xx 的架构编写，交换机部分支持 switch 接口/swconfig 命令，但是不支持任何硬件加速功能（如 HWNAT）。
以太网驱动的 MAC 地址是硬编码的，实际使用时请选择一种方法读取正确的值。

没有合适的无线芯片驱动。rtl_wifi 无法支持 RTL8192DR，并且需要较大的内存才能使用。原厂 SDK 的 rtl8192cd 结构太差，不想移植（其实是不熟悉 mac80211 框架）。

生成的固件分为 factory 和 sysupgrade。其中 factory 用于从原厂固件升级，或通过 bootcode 升级；sysupgrade 只能通过在 LEDE 中刷入。
固件能够兼容 LEDE 的 rootfs split 功能，同时能通过 bootcode 的校验。

工具链增加了 Lexra LX4180 支持，能够向上兼容其它的 Lexra 架构。对工具链的改动不影响其它的架构。

!!!!注意!!!!
请一定使用 uCLibc 作为固件的 C 库！
musl 会导致 init 进程崩溃！

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This is an unfinished project, and it's likely I'm not update it anymore.

This code used no original codes from Realtek SDK. I rewrote all arch codes and drivers based on it, to fit standards from Linux and LEDE.

The arch codes has reserved spaces to add support for other RTL819X SoCs.
The SPI driver uses standard Linux SPI Bus interface, which can be used together with m25p80 to support most of the SPI NOR flashes.
The ethernet driver used the ag71xx's framework as a reference. The switch driver supports the switch interface/swconfig command, and has no hardware acceleration supports (e.g. HWNAT).
The ethernet driver uses hard-coded MAC address. Please change this when using it.

There's no wireless support. The rtl_wifi driver cannot support RTL8192DR, and uses lots of memory to get work. The factory driver rtl8192cd has bad structures that I cannot port it to LEDE.

The generated frimwares contain factory and sysupgrade. The factory firmware is used to upgrade from factory firmware or from the bootcode. The sysupgrade can only be upgraded from LEDE.
The firmware supports rootfs split, and is also compatible with bootcode's validation.

The toolchain adds support for Lexra LX4180, which is compatible with other Lexra architectures. The modification does not affect other architectures.

!!!!IMPORTANT!!!!
Please do use uClibc as the C library!
musl can crash the init process!

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This is the buildsystem for the LEDE Linux distribution.

Please use "make menuconfig" to choose your preferred
configuration for the toolchain and firmware.

You need to have installed gcc, binutils, bzip2, flex, python, perl, make,
find, grep, diff, unzip, gawk, getopt, subversion, libz-dev and libc headers.

Run "./scripts/feeds update -a" to get all the latest package definitions
defined in feeds.conf / feeds.conf.default respectively
and "./scripts/feeds install -a" to install symlinks of all of them into
package/feeds/.

Use "make menuconfig" to configure your image.

Simply running "make" will build your firmware.
It will download all sources, build the cross-compile toolchain, 
the kernel and all choosen applications.

To build your own firmware you need to have access to a Linux, BSD or MacOSX system
(case-sensitive filesystem required). Cygwin will not be supported because of
the lack of case sensitiveness in the file system.


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